Feeding mechanism



Oct.. 20, 1931. R. c. DANLY 1,823,595

FEEDING MECHANISM Original Fi led Feb. 1, 1930 3 Sheets+Sheet lINVENTOR. flask-fir C. Z7A/V1. Y BY FEEDI NG Original Filed Feb. 1, 1930DAN L Y 1,828,595

MECHANISM 3 Sheets-Sheet 2 i I I f I 3 I IIIIIIIIIIII/ [III I.

INVENTOR.'.

19055976? flA N1. Y

A TTORNE Y.

' finished work are serially guided and fed into the grinding throat orzone-1 of an associated centerless grinding machine. And in adjacentrelation tosaid bracket frame 2, the base 1 is provided with a lug orcar 3 constituting a p rty of an attaching means whereby the presentfeeding attachment is rigidly connected to the'frame of a centerlessgrinding with.

machine in proper operative relation there- At its upper end the base 1carries a hopper 4 adapted to contain asupply of unfinished headedtappets or likecpieces of unfinished work to be operated on, with saidhopper provided with an oscillatory selector member or' plate,5 adaptedto lift, in serial order, pieces of unfinished work and place the sameon an inclined track or guideway 6, down which the pieces of work areadapted to slide and be singly engaged and fed by the automatic 5feeding mechanism hereinafter described in detail. The construction andoperation of the oscillatory selector plate or member 5 is substantiallythe same as that'described in the aforesaid Danly Patent No. 1,725,444,the

construction being such that in the case of a in a rearward positionthereon.

headed tappet or like headed article, the same will be selected andplaced upon the inclined track or guideway 6 with its headed portionIntermediate the length .of the inclined track 6 and immediately abovethe same, a

revoluble disk 7 is mounted, andwith such disk provided with a series ofradial blades 7', on its perimeter, with said-blades adapted to engagethe pieces of worklowermost on the track 6, and retard undue rapidity ofdescent of the same, while at the same time insure further descent ofthe same in single and successiveorder.

fAt'iitslowerend theinclinedktrack 6 is formed with a horizontalextension fi onto which the pieces of work on the track are I seriallyreleased, then moved'a'long said track v minal end of said trackextension 6'.

extension 6 and discharged intoa downspout or boot 8 by the automaticrelease and feed-Y ing means hereinafter described Said downspout orboot' 8 is fixedly attached at the ter V In the preferred constructionshown, jthe downspout or boot 8 comprises a main stationary portionfixedly attached to the delivery end of the track extension 6 and amovable portion 8 hinged to the stationary portion as shown, with saidmovable portion provided at top with a tapering plate ex= tension 9which projects into the path of a if passing pieceof work on the trackextension 6' so that a swinging or opening movement of the movable bootportion 8 will be eflected by the passing piece of work to afford-a freedownward passage of the same through the downspout. The movable portion8 of the downspout-is normally held to its closed position a spring 10,as shown.

In receiving relation to the lower or dischargeend of the downspout8,.means are provided for'receiving the pieces of work, and from suchmeans the pieces of work are serially passed into the grinding throat ofa centerless grinding machine, said receiving means comprising aconstruction as follows:

Said receiving means consists of a primary trough shaped member 11 and asecondary trough shaped member 12, hinged together in side by siderelation with both of said members 11 and 12 pivotally mounted at oneend to the end of the aforesaid bracket frame 2 of othe main base 1 by atransverse-pivot connection between the secondary member 12 and. the endof said bracket. Such arrangement being adapted to permit of an upwardtilting, by automatic means hereinafter described, of the members 11and12, in order to providea clear wayvfor a piece of finished work asthe same is automaticallypushed out of, the grinding throat of anassociated grinding machine.

In the construction shown, the primary work receiving member 11 isarranged in aligned receiving relation to the lower end of the downspout8 heretofore described while the secondary receiving member 12 hasproper aligned relation to the grinding throat of the associatedgrinding machine. In such construction the pin tle of the hingeconnectionbetwe'en said receiving members 11 and 12 hasfixed connectionwith the primary receiving member'll, so thatthe same may re ceivethrough the operative connections hereinafter described with saidpintle, an intermittent tilting movement, and with each tilting movementa piece of work in said member 11 will be discharged into the secondaryreceiving member 12, and in proper positionto be pushed into thegrinding throat of the associated grinding machine. Such pushing orfeeding operation into the grinding machine is effected by alongitudinally reciprocating rod orplunger 13, preferably of theflexible coiled wire type, operatively attached by'a coupling head 13withthe reciprocating bar 39 of the hereinafter described centralcontrol mechanism, as follows 1 A central controlling mechanism, bywhich the operations of the SGIleSOf mechanlsms of this invention areset in action in regular and work feeding mechanism'that are associatedwith the inclined track or g'uideway as herei'nafte'r described indetail.

The, mechanism for imparting. a tilting movement to the f primaryworkreceiving member 11 comprises a flexible shaft 42 one endof which isoperatively attached to the journal pin ofsaid primary member 11, whilethe other end of the shaft 42 is attached to a semi-rotary drum or hub42 j ournalled in the bracket frame 2 of" the main base 1, and formedwith cam or spiral groove in itsperimeter as shown in Fig. 6. Said camor spi-' m1 groove is'in operative engagement with a st'ud 43 on anperatingbar 44 that has sliding movement on the'aforesaid bracket 2,withits movement in one direction effected by a spring 45, with a positivemovement in the 7 lease of the pieces of. unfinished work on theinclined track 6 comprises a transversely swinging yoke 46 havinganangul'ar extens on 46' by which it is pivotally attached to a fixedpart of the main base 1.

r I At a point in the path of the pieces of work on the inclined track6, the aforesaid swing: ingyoke 46 is provided with a pair of stop lugsor fingers 47 and 47 arranged in staggered and transversely spacedrelation in the path of thep'ieces of work, with therlowerorder duringthe operation of the of the. present apparatus.

most lug 47 in a movement of the yoke 46 in'one direction adapted torelease an arrested piece of workand permitv of its further-descentalong the track 6, while the uppermost lug or finger 47 in a movement ofthe yoke 46 in the opposite direction is adapted to release a succeedingpiece of work andpermit the sameto move down into an arrested conditionagainst the lug 47 with such alternate operations taking place in serialv mechanisms Oscillation 3 of the aforesaid transversely swinging yoke46 is attained by a cam lug 48 on the aforesaidsliding head 41 carriedby the sliding bar 39 aforesaid, with such cam lug in its movement inonedirection adapted tohave operative engagement with a stud orprojection 50 on the aforesaid yoke 46 to attain a movement of the samein onedirection, a movement of the yoke in the opposite direction beingattained by a'spring51;

1 Subsequent "to the Work release just described, the mechanism forfeeding the pieces of unfinished work along the horizontal trackextension'6 and into the downspout or boot 8 comprises an arrangement ofparts as fol- An oscillatable plate 52 of an angular form is pivoted at53 onv the heretofore described reciprocating head 49, which is fixedonand moves with the sliding bar 39 from which other units of thepresent mechanisms receive motion. In the construction shown theforward-and angular portion 52of the plate 52projects into the path ofthe pieces of work passing onto the horizontal track extension 6 and inthe movement of the lowermost piece of work is displaced laterally toreturn behindsaid piece of'work in'its further passage along said trackextension, and sot-hat in a succeeding movement of the head 49 and ofwork into said downspout at each oper-' ation of the mechanism.

The operation of the feeding mechanism is as follows:

Vith the parts in the position shown in Fig. 2, the operating arm 36 ofthe central control mechanism has moved from its normal position of restto the left in said view, a distance to the right sufficient to lowerthe pair of work receiving troughs 11, 12 from their normal upwardlytilted position shown in dotted lines to the horizontal position for useshown in full lines in said view.

Such normal upwardly tilted condition of the troughs 11, 12 is for thepurpose of providing a clear way for the passage of a piece of finishedwork from the grinding throat 1 of'an associated grinding mechanism bythe automatic work ejecting unit of the same. I

In the inactive condition of the central control mechanism of'thepresent construction, its locking bar 24 is in place upon the camprojection 23 of the driven clutch member 22, to maintain the same inits disengaged posi tion, and in which condition of the mechanism,theoperating arm 36 is in a position to the extreme left of its path ofmovement, ready for the commencement of an active cycle of movements ofthe same. In such position of the parts the work receiving troughs 11,12 are in the'heretofore described upwardly tilted condition showniindotted lines in Fig. 2 for the purpose heretofore stated.

With an active operation of the finished work ejecting unit ofacenterless grinding mechanism, the same, through its operativeconnection by link 26, will through the intermediate connections 27, 28and 29, effect a withdrawal of the locking bar 24 from its engagementwith the cam projection 23 of the ate connections 21,32 and traumasdriven clutchmember22 and permit the same "(to move into operativeengagement wit h'dr-iv- --ing*c lutch member 19, to start-the controlmechanism in a cycle-of its movements, through the heretofore describedintermedi- 34: impart a rocking-motion to-the shaft 35 and the operatingarm 36, swinging'said arm first to the right and then" back to the leftornormal starting "P ion of-Ysaid arm.-- k. i wTheswingingmovementsofthe operating arm 36zjust described, is effected byasingle revolution ofthe-countenshaft 21' which res ceives motion tromthe driven clutch member 22,=andthe stoppage of the mechanism at thethe-team projection 23 of the driven clutch nember22, riding-up the endof the locking I I .cable'plung'ermovingin the seoondary trough I andadapted to move a piece of workirom the same into the; grinding throatofa grinding mechanism. v

bar'24, and forcing said driven clutch mom ,ber out of operative engagement, with the conestantly rotating driving clutch. member 19.

f Aperiod of rest then prevails until'a sue ceeding. cycle of operationsare started' in the manner heretofore described.

arm 36 to the rightrthe pair of'work receiving troughs 1 1, 12 arelowered from their upwardly. tilted condition shown in dotted lines I 21 In the initial movement of the operating ;in Fig. 2, to theapproximately,horizontal pd sition shown in.;full-- linesin said VlGW',

through the intermediateconnections 37 and 38 with the transversepivotalmounting of .zsaid troughsonthemain base;

7 Continuedmovement of .-.sa1d aoperating arm 36 to: the right, throughintermediate connections39 and l3 will impart longitudi- 2i Ina moygmentt Q th G IOd'O plun 13- tthe secondary receiving trough 13, to push apiece :of unfinished work in said trough into the igrindingrthroat 1.fof. an associated center gless grinding mechanism.

Q lathe-movement, fsaid t I I operating arm36 to the left thesliding-bar39 moving with the arm 36 and through the attachedoperating-studaortappet 40. has operative' contact with'the sliding'bar 44 to move thesameto theleft and through the stud orflpin 43 and spiral groove ofthedrum 42' -impart a semijrevolutio'n to the a shaft 42, iandithroughsaid shaft a tilting movement to the primary work receiving trough .11;

' "The above trough 12, has for its-purpose the transfer ofa" piece of[oik from the trough 11 into the trou iaread for delivery in the man- 7nor above 'set'forth into the grinding throat i and '52. are bothoperated through the slid nq'bar39. by the mover'nentof the ope'ratin rarm 36 aforesaid. the serial'onerationof said mechanisms'will take placein proper order,

1.7 In aifeeding mechan1s1n; of the type (10- scribechthe-combination ofprnnaryand sec- I getlier in sideby side relation, thesecondary {1troughadapted for aligned'relation with the grindin g throat of.agrinding' mechanism, 7 arid the primary trough-adapted for aligned I:work, means for imparting an upward tilting; so end of said singlerevolution isefiected movement tos'aid tr01lghS,fr16a11- for efiec ng'throat of a grinding mechanism. 3

I I I described tiltingmovement of the primary troiughlltowards thesecondary assetforthinpthe description ofparts ina preceding. portion ofthe speclfication. 5

. i-IIavin thus fully described my invention, what I c aim as new, 1s iondary work receiving troughs pivotally mounted "on the 7 base of themechanism, a hinge COI1I1BC1310I1 securing; the troughs .to-

relationwith a supply sourceof unfinished tilting movement of theprimary trough towards the secondary trough, and a recipro- V 2. {In a'feedingmechanism the v scribed, the combination; of primary and;secondary work receivingtroughs. pivotal-1y mounted on-the-base ofthefmechanismya h nge connection ,securinglthe troughs together in Isideby side .lrelation, the secondary trough .adaptedfor alignedrelation with the grin d'-. I ing throat of a grinding mechanism, andthe, primary troughadapted for aligned relation I with a supply source:ofunfinished work,: lmeansfor imparting an upwardtilting movemerit; tosaid troughs, ,qmeans; for effecting; a tilting movementof the primarytrough tos wards the .'secondary trough, and a reciprocable plungerhaving the form of a coiled'wir'e shaft, moving in said trough tomoveapiece v"of work from the, same into the grinding I In a feedingmechanism ofthe type de- 105 scribed, the combination off primary r-an'dsecondary jwork -receiving troughs pivotally mounted on the'rbaseoflthe' mechanism, a hinge connection scouring the troughs togetherainside by side relation, the secondary trough adaptedfjor.aligned relation with the grinding throat of a grinding mechanism, and{the primary trough adapted for aligned rela int-ion with a supplysourcel'of unfinished work, means for imparting an upward tiltiugmove'cement to said. troughs, means 'for elfectingya tiltingmovem'ent of theprimary trough towards the secondary trough, thesame 'com- 7 fprising anintermediate shaft connected" at rone-iendgto the pivot pintle'o-f theprimary 7 trough, mean's K for imparting intermittent 'semirotationtosaid shaft,and areciprocahle plunger moving in the secondary trough andadaptedtlo .Inovefa piece of work: from the 5 amt. intothe grindingthroat of agrinding mechanism..,r

4; In a ,feeding mehanisiriofthe type deo scribed, the combination ofprimary ands'ece y W k. r ce i g .trqugh'sppivotally 1w,

-mounted on the'bas'e of the mechanism, a

hinge connection securing the troughs together in side by side relation,the'secondary trough adapted for aligned relatlon with the grindingthroat of a grinding mechanism, and the primary trough adapted foraligned relation'with a supply source of unfinished Work, meansforimparting an upward tiltlng movement to said troughs, a reciprocableplunger moving'in the secondary trough for discharging work therefrom,and means moving in '20 trough adapted for aligned relation with thegrinding throat of a grinding mechanism, a and the primary troughadapted for 1 aligned unison with the reciprocable plunger foreftecting'a tilting movement of the primary trough towards the secondarytrough.

5. In a feeding mechanism of the type described, the combination ofprimaryand secondary work-receiving troughs plvotally 'mounted on thebase of the mechanism, a hinge connection securing the troughs togetherin side by side relation, the secondary relation with asupply source ofunfinished work, means for imparting an upward tllting movement to' saidtroughs, means for effecting a tiltingmovement of the primary troughtowards the secondary trough, the

7 same comprising an intermediateshaft con- *nected at one end tothepivot pintle of the primary trough, a'spirally grooved drum connectedto the other end of said shaft, a sliding bar having stud engagementwith the grinding mechanism.

grinding throat (of a 6.1In a feeding. mechanism of the type described,thecombination of primary and secondary Work receiving troughs pivotallymounted onthe base hinge connection securing the troughs together inside by side relation, the secondary of e the mechanism, a

trough adapted for 'aligned'relation with the V grinding mechanism, andthe primary trough adapted for aligned relation with. asupply source ofunfinished .work, means for imparting an upward tilting movement'to saidtroughs, means for effecting a tilting movement of the primary troughtowards the secondary trough, the same comintermediate shaft connectedat pivot vpintle of the primary trough, a spirally grooved drumconnected to the other end of said shaft, a sliding bar having studengagement with the spiral groove of said drum,"a reciprocable plungermov ng in the secondary trough and'adapted to move a pieceofworktherefrom into the grinding throat of a grinding mechanism, andmeans moving in unison with said plunger for imparting intermittentmovement to said' sliding bar.

In'afeeding mechanism of the type deary trou h,

hinge connection securing troughs,

scribed, the combination of primary :and secondary work receivingtroughs pivotally mounted on the base of the mechanism, a hingeconnection'securing the troughs together in side by side relation, meansfor a imparting an upward tilting movement to said troughs, means foreffecting a tilting movement of primary trough towards the secondarytrough, "a reciprocable plunger moving in the secondary trough todisplace apiece of work therefrom, and a central automatic controlmechanism having start ing connection with the workejecting unit of acenterless grinding mechanism and adapted to make a complete revolution,a;

vibratory arm receiving a forward and rearondary work receiving troughspivotally ii mounted 'on' the base gether in side byside relation, meansfor impartlngan upward tiltlng movement'to said plunger ofthe secondaryreceiving of the mechanism, a hinge connection securing the troughstotroughs, means for effectingajtilting m'ovement of primary troughtowards the secondg a reciprocable' plunger moving 1n thesecondarytrough to displace apieceof work therefrom, and a "centralautomatic control mechanism having starting, conn (:1:

tion with the work ejecting unit of a centerless grinding mechanism .andadapted to make a complete revolution, a vibratory arm receiving aforward and rearward movement from said control mechanism, a linkattached at one end to the midlength' of said vibratory arm and theotherend to. a rock arm on the transversefjournal hub of the aforesaidreceiving troughs, and operative connection betweensaid arm and theaforesaid reciprocable plunger. a

9. In a feeding mechanism of the type -de scribed, the combination ofprimary and sec ondary work receiving troughs pivotallv mounted on thebase of the mechanism. 21

the troughs together in side by slde relation, means for imparting anupward tilting movement to said ,means for effecting a tiltingcmovementof primary trough towards the secondary trough, .a reciprocable plungermoving in the secondary trough to displacea piece of work therefrom, anda central automatic control mechanism having starting connection withthe work ejecting unit of a centerless grinding mechanism and adapted tomake a complete revolution, a vibratory arm ment from saidcontrol tachedat one end to the mid-length of said vibratory arm and at the otherend-to a rock arm on the transverse ournal hub of the receiving troughsaforesaid, and a sliding bar having operative connection at oneendwiththe vibratory arm and attheother. end with, P the reciprocable' plungerof the secondary trough. 1 f i i i-OLIn afeeding' means of the. typedescrihed, a central :aiitomaticzcontrol' unit comprising a; 'rimaryshaftjzhaving constant rotation, a counterash'a'ft inoperative relationfiO. said priinary shaft, a driving'clntch mem- :ber loosely mounted onsaid counter-shaft and having gearing connection with saidprimary shaft,a driven; clutch member having slid- .ing engagement with saidcounter-shaft, acam formation on said drivencl'ntch vmember and actingto move and hold said" driven clutch member in its. disengaged.position,

" 120 means for moving the driven clutch member into an engaged.condition,i a movable abutment bar having movement into and out of thepath of the aforesaid cam formation and adapted to act in connectionwith said forma- I o tion in moving and holding the driven clutch memberin its disengaged condition, and in effecting a release from suchdisengaged cendition, a vibratory operative arm having intermediateoperative connectionsiwith said $0 counter-"shaft to receive a-tforwardand back- :WLICl movement therefrom, said vibratory arm being adaptedfor operative connection Withthe 'feedingnnits 'of. a Work feedingmechanism. J

11. In a feedin scribed, :a central antomatickcontrol 'nnitcomprising aprimary shaft having constant rbtation, a counter-shaft in operativerelation 'to said primary shaft, adriving clntch member loosely mountedon said counter-shaft and having gearing connection with said primaryshaft, adriven clutch member having sliding engagement ,Wi th saidcounter-shaft, a cam formation in said driven clutchmember and acting tomove and hold said. driven clutch member in its disengaged position,means for moving the driven clutch member into an engaged condition, amovable abntmentbar having movement into and out of the path of theaforesaid cam-formation and adapted to act. in connection with saidformation in moving and holding the driven clutch memher initsdisengaged"condition,and in effecting arelea-se from such disengagedcondition, a. rock shaft in operativeii'elation to said counter-shaftand having-operative connectiontherewith through 'a'crank arm onthccounter-shaft, a link connectingthe crank rinof said arm witha rock armon said rock .sco shaft. and avibra-toi'y operating arm harried on saidrock sh'aft i I Y i 12. In av feeding means I f the type described, acentral automatic controlnnit comprising a primary sea having constant,c rotation,-a counter-shaft. inoperative relamember loosely mounted .on-.;said countershaft and having gearing connection with said primaryshaft, a driven clutch member; having sliding engagementwith saidconnter i 1 shaft, a cam formation on said'rdriven clutch member andacting to move and hold said "driven clutch member in its disengagedposition, means for moving the driven-clutch member into an engagedcondition, a rnov-i able ab'utment bar having movement into and i I outof the path-of the aforesaid camiformae ti'on andadapted to act inconnection with "saidformationin moving and holding the driven clutchmemberin its disengaged con "di-tion, and in 'efiecting a release.fl'OlillSillCil pdisengaged condition, means for imparting 'movement tosaid" abutment barfiin unison with the movement a of the" Work ejecting1 means of a. grinding mechanism, a vibratory operating armhavingintermediate operative connections: with said counter shaft to receive.,a forward and backward movement therefrom, said vibratoryarmheingadapted for operative'connectioni with the" feeding units of aWork feeding mechanism, a ,1: 13. Inja feedingmeans. ofthextypdescribed, a central automatic control unit' com prising aprimarylshaft having constant rotation, a counter-shaft in operative Y'rel'a 'tion to saidprimary shaft, a clrivingclutch i shaft and havinggearing connectionavith A said primary shaft, a driven clutchmeinber;

clutch member. intoan engaged condition, a

movable abutment -bar having movement into and out ofthe "pathi'of theaforesaid cam formation and adapted to act inconinection with saidformation :in moving-and holding the driven 'clntch memher in its dis-.enga'gedconditiony "and' in. effecting a release from such disengagedicondition,means for imparting movementto said abutment barin-unisonwith" the movement of the Work ej ecting means of agrinding mechanism,"the same comprising alink adapted: for connec j tion to said ejectingimean's, a roc krshaft having crank arm connection with saidli11k',a v secondary crank armon said roek-shaft, and I I a linkconnecting said secondary crank arm 7 'With-saidabutmentbar; I

i k 14; Ina feeding means ofrr the type dev scribed, .a centralautomatic control unit as i means of the type; de having sliding"engagement with said comprising a primary shaft havingconstant H N 'tionto said primary shaftyadriving clutch member loosely mounted on saidcounter shaft" 7 and having gearing connection a with said primaryshaft, a driven-clutch member having sliding engagement with' saidcounter-shaft, a cam formation on said driv- -en clutch member andacting to move and :hold said driven clutch member in 1t-s dis- :engagedposition, mieans fof r moving the driven clutch member into an engagedcon- :dition, a movable abutment bar having movement into and out of thepath of the aforesaid cam formation and adapted to act in 00111180151011with said formation in moving and holding the drlven clutch member in-.its disengaged condition, and in effecting a release from suchdisengaged condition, a

rock shaft in operative relation to said counter-shaft and havingoperative connection therewith through a crank arm on the counter-shaft,a link connecting the crank ppm of said arm with a rock arm on said rockshaft, a vibratory operating arm carried on said rock shaft, means forimparting movement to said abutment bar 1n unison'with the movement ofthe work ejecting means of a grindingmechanism, the same comprising alink adapted for connection to said ejecting means, a rock shaft havinga crank arm connected withsaid link, a secondary'crank arm on said rockshaft, and a link connecting said secondary crank arm with said abut--ment bar;-

15. In a'feeding mechanism, the combination of a. main base, aworkcontainmghopper, a selector mechanism associated with said hopper,an inclined trackadapted to ;receive pieces of work from said selectormechanism, a fixed receiving downspout at the lower end of said track,means forse'rialfeeding pieces of work from said track into saiddownspout, means for feeding the -piecesof work from said downspout intothe grinding throat'of a grinding mechanism, the same comprising primaryand secondary work receiving troughs pivotally mounted on the machinebase, a hinge connection setilting movement to. said troughs, means foreffecting a' tilting movement of the primary trough towards thesecondary trough, and a reciprocable plunger moving in the secondarytrough and, adaptedto move a piece of work from the same into thegrinding throat of .a grinding-mechanism.

16. In a feeding mechanism, the combination of a main base, a workcontaining hopper, a selector mechanism associated with said hopper, aninclined track adapted to receive pieces of Work from said selectormech- ,anism, a fixed receiving downspout at the lower endof said track,means for serially vfeeding'pieces of Work from said track into saiddownspout, means for feeding the pieces of work from said downspout;into the grindspout, means for imparting an upward tilting movement tosaid troughs, means for effooting a tilting movement of the primarytrough towards the secondary trough, and "a rcciprocable plunger havingthe form of a coiled wire shaft, moving in said trough to;

move a piece of worktherefrom into the grinding throat of a g 'indingmechanism.

I 17. In a feeding mechanism, the combination of a main base, a workcontaining hopper, a selector mechanism associated with;;

said hopper, an inclined track adapted to receive pieces of Work fromsaid selector mechanismfafixed receiving downspout at the lower endof'said track, means for serially feeding pieces of work from said trackinto.

said downspout, means for feeding'the pieces of work from said downspoutinto the grinding throat of a grinding mechanism, the same comprisingprimary and secondary work receiving troughs pivotallyrmounted on the.

machine base, a hinge connection securing the troughs together in sideby side relation, the secondary trough being adapted for alignedrelation with the grinding throat of a grinding mechanism and theprimary trough adapted for aligned relation with said downspout, meansfor imparting an upward tilting movement to said troughs, means foreffecting a tilting movement of the primary trough towards the secondarytrough, the

same comprising an'intermediate shaft'connected atone end to the pivotpintle of the primary trough, means for imparting intermittentsemi-rotation to said shaft, and a reciprocable plunger moving in thesecondary trough and adapted to move 'a piece of work from the same intothe grinding throat of a grinding mechanism.

18. In a feeding mechanism, the combination of a main base, a workcontaining hopper, a selector mechanism associated with said hopper, aninclined track adapted to. receive pieces of work from saidselector'mecha nism, a fixed receiving downspout at the lower end ofsaid track, means for serially feeding pieces of work from said trackinto said downspout, means for feeding the pieces of work from saiddownspout into the grinding throat of a grinding mechanism, the samecomprising primary and secondary work receiving troughs pivotallymounted on the machine base, a hinge connection securing the troughstogether in side by side relation, the secondary trough being adaptedfor aligned relation with the grinding throat of a grinding mechanismand the primary trough' g disenga e adapted for aligned relation withsaid downmeans moving in unison with the reciprocamechanism, v p

the lower end of said track, means for serially I feeding p1eces of workpieces of work ble plunger for effecting a tilting movement of theprimary trough towards the secondary trough. I v I 19. In a feedingmechanism, the combination of a main base, a work containing hopper, aselector mechanism associated with said hopper, an inclined trackadapted to receive pieces of work from said selector a fixed receivingdownspout at from said trackinto said downspout, meansfor feeding thepieces of work from said downspout into the grind: ing throat of agrinding mechanism, the same comprising primary andsecondary workreceiving troughs pivotally mounted on the' machine base, a hingeconnection securing the troughs together in side by'side relation, thesecondary trough being relation with the grinding throat of a grindingmechanism and the primary trough adapted for aligned relation with saiddownspout, means for imparting an upward tilting movement to saidtroughs, means for effecting a tilting movement of the primary troughtowards the secondary trough,,the same comprising an intermediate shaftcon-l ne'cted at one end to the pivot pintle of the primary trough, aspirally grooved drum connected to the other end of said shaft, asliding barhaving stud engagement with the spiral groove of said drum,and a reciprocable plunger moving in the secondary trough and adapted tomove a piece of work therefrom into the grinding throat of a grindingmechanism.

20. In a feeding mechanism, the combinaa work containing hopper,

tion of a main base,

associated with said a selector mechanism hopper,

downspout at the lower end a fixed receiving for serially feeding ofsaid track, means spout, means for feeding the pieces of work from saiddownspout into the grinding throat of a grlnding mechanlsm, thesamejcompris- F ing primary andsecondary work receiving troughspivotally mounted on the machine base, ahinge connect-ion securing thetroughs together in side by side relation, the secondary trough beingadapted for aligned relation with the grinding throat of a grind-,

ingmechanism and the primary trough adapted for aligned relation withsaid downspout, means for imparting an upward tilting movement to saidtroughs, means for effecting a tilting movement of the primary troughtoa tpiece of adapted for aligned I an inclined track adapted to receivepieces of work from said selector mechanism,

from said track into said downwards the-secondary "trough, the 1 samecomprising};' intermediate connected' at one end to *the :pivot ipintlelot the Lprimary trough,iai spirallyfgroovedidrum conneeted to ofsaitlzdrum azreci orocable alun 'ermovin in theis'econrlaryitrough 1 andadapt-ed to move Ywork'itherefrom unto ithesgrnrding throat of a: grnding une'chani'sm, :an'd means moving mill un son with i saidplungerifor .im

part-ing intermittent movement'to said slid mgthar. 121'. )In ta feedingmechanism, ith'e combinatiorrofiamainibase 1-awork"containin ho aer v vP a a selector "'meohanisni associated with jf'said; v

hopper, i. an inclin'edrtrack adapted to receive. pieces of workrfrom;saideselector mechanism; adix'e'd ire'ceivingi downspout at the alofweriend of asaid iiti'ack, inreans. for serially feeding pieces:of'wiorkifrom said track into said downspout, mean's'for feeding the:pieces of work from said rdownspoutinto th'egrindingzthro at of agrinding;me'ch'an sm,,'thesamecompr1s s and secondary 'iw'ork.i'ecei-ving ing :vprimary troughs fpivotally m oun-teet on the.:machine base, azhinge-zconnection securing the troughs together:invside'bygsic e relation, "the secrelationwwith': the grinding;:thr0atf0f -=a grind ondary trough-being.nadaptedufor aligned jingmechanismandtheipriinarytrough adapt ed if-or aligned relationrwithsaid :clownspout, means :for impartingan upwarditiltingmove ment 3 tosaid-troughs, means r01- effecting ta tilting movementofithe-zprimary=trough towards the-secondary(trouglnaa reidipro'cable plungen-movingin: the secondary trough and adapted to move a piece of 'aworkr'lfrom'the same into the grinding-throat of'afigrinding mechanism, and centralautomatic control mechanism having-startingconnection with the work ejectingf mechanism. of a centerl'ess v grinding mechanism eandaadapted tomake a complete revolution-,--a xvibratory"arm rece1ving forward and reaand movement. from said ;control ;mechanism,-a'nd operative icon-ltiltingme'ans of the work receiving troughs anddeelwveen said arm andzthe plunger of sth'e secondary ;receivmg trough.

tionrof a -ma-in basegawork containingi'h'ope nections between; said:armv :the upward per,.(ayse lector ,zmechanism associated -'w1th saidhopper, an inclined track'adapted to fromv said selector receive pieeesof work mechanism, -;a afixed receiving downspout fiat into saiddownspout, means for feeding the pieces of'work from said downspout intothe grinding throat of a grindingmechanism,

- the lower end of said track, means fori-serial-l thesamecomprising-primary and secondary s work receiving troughs pivotallymounted on the machine base, a hinge connection securing the troughstogether in sidepby side relation, the secondary trough being adapted.forialigned relation with the grinding throat of a grinding mechanismand the primary trough adapted for aligned relation with 5 saiddownspout, means for impartlng an upward tilting movement to saidtroughs, means for effecting a tilting movement of the primary troughtowards the secondary trough, a 'reciprocable plunger moving m '10 thesecondary trough and adapted to move a piece of work from the same intothe grinding throat of a grinding mechanism, and a central'automaticcontrol mechanism havlng starting connection withthe work ejectingmechanism of a centerless'grinding mechanism and adapted to make acomplete revolution, a vibratory arm receiving a forward and rearwardmovement from said control mechanism, a link attached at one end'to .the2 mid-length of said arm and atthe other end to a rock arm on thetransverse journal hub of the aforesaid receiving troughs, and operative connections between said arm and the aforesaid reciprocableplunger. 2 I 23. In a feeding mechanism, the combi- Y nation of a mainbase, a work containing hopper, a selector mechanism associated Y withsaid hopper, an inclined track adapted to receive piecesfof workfrom'said selector mechanism, means for retarding and feeding the workin its downward passage on said track, the same comprising a revolubledisk having peripheral blades adapted to engage the pieces of work, afixed receiving down- 3 spout at the lower end of said track, means forserially feeding pieces of work from said track into said downspout,means for feeding the piecesof work from said downspout into thegrinding throat of a grinding 40 mechanism, the same comprising primaryand secondary work receiving troughs pivotally mounted on themain-base,a hinge connection securing the troughs together in side bysiderelation, the secondary trough being adapted for aligned relationwith the grinding throat of a grinding mechanism and the primary troughadapted for aligned relation with said downspout, means for imparting anupward tilting movement to said troughs, 01 means for effecting atilting movement of the primary trough towards the secondary trough, anda reciprocable plunger moving 1n the secondary trough and adapted tomove a piece of work from the same into the grindingthroat of a grindingmechanism.

In testimony whereof I hereunto aflix my signature, V

- 'ROBERT C. DANLY.

